Portugal Tax Calendar for Individuals (2026)
Portugal operates a predominantly self-assessment tax system. For private clients, this means that tax compliance in 2026 is not limited to filing the annual IRS return. Depending on personal circumstances, individuals may have ongoing reporting and payment obligations throughout the year.
This Insight summarises the main obligations applicable to individuals, self-employed professionals, household employers, property owners and vehicle owners.
1. Self-employed individuals (trabalhadores independentes)
If you are registered as self-employed in Portugal, your core obligations generally include:
Issuing invoices
Timing: up to 5 days after the sale of goods or provision of services.
Invoices must be issued through the Tax Authority’s system or certified software.
Social Security
Quarterly income declarations (January, April, July, October) if under simplified regime or montlhy if under organized accountancy
Monthly contributions: payable between the 10th and the 20th of the month following that to which they relate.
VAT (where applicable)
VAT returns and payment:
Quarterly regime (simplified regime): by the 20th of the second month following the quarter-end (May 20, August 20, November 20, February 2 0 of 2027)
Monthly regime (organized accountacy): by the 20th of the second month following the taxable period.
These obligations apply regardless of whether income is later taxed under the general IRS rules or under a special tax regime.
2. Employers of domestic workers (household employment)
Households employing domestic workers are subject to specific registration, reporting and payment obligations, both before the Social Security and the Tax Authorities.
Social Security
Registration of the employment relationship: The domestic worker must be registered with Social Security upon commencement of the employment relationship.
Monthly contributions: Social Security contributions must be paid monthly, based on the agreed remuneration.
Contribution rates: 9.4% borne by the worker and 18.9% borne by the household employer.
Payment deadline: between the 10th and the 20th of the month following that to which the remuneration relates.
Any changes to remuneration must be communicated in order to ensure correct assessment of contributions.
Income reporting (IRS)
Annual reporting of remuneration paid: The household employer must annually report the remuneration paid to the domestic worker, enabling the worker to comply with personal income tax obligations.
Deadline: This reporting must be completed by the end of January of the year following that in which the income was paid, through the relevant reporting mechanism made available by the Tax Authority.
Failure to comply with these obligations may result in penalties, difficulties in regularising the employment relationship and, in certain cases, the loss of applicable tax benefits.
3. Property owners (IMI and rental income)
Individuals owning Portuguese real estate may be subject to both ownership-related taxes and income-reporting obligations, depending on whether the property is rented.
IMI — Municipal Property Tax
Assessment reference date: property ownership as at 31 December 2025.
Payment in 2026:
One instalment: May (IMI ≤ €100)
Two instalments: May and November (€100–€500)
Three instalments: May, August and November (> €500)
Issuance of electronic rent receipts (recibos eletrónicos de renda)
As a general rule, landlords receiving rental income are required to issue electronic rent receipts through the Tax Authority’s portal.
Timing: a receipt must be issued at the time the rent is received, or by the legal deadline applicable to the receipt issuance for that period.
Electronic rent receipts replace the need for annual reporting of rents through Modelo 44.
Failure to issue electronic rent receipts may trigger penalties and inconsistencies in the IRS assessment.
Modelo 44 — Annual Communication of Rents Received (exception)
The Modelo 44 may only be used where the landlord is legally exempt from issuing electronic rent receipts and does not opt to issue them. This may occur, for example, in situations involving landlords aged 65 or over, landlords without access to or obligation to use electronic means, or other specific cases expressly recognised by the Tax Authority. In such cases, the annual communication of rents through Modelo 44 becomes mandatory.
Deadline: By 31 January 2026, for rents received in 2025.
This obligation exists independently of the IRS return and is one of the most frequently overlooked compliance steps by individual landlords.
4. Vehicle owners (IUC)
Vehicle tax (IUC) is payable annually, in the month corresponding to the vehicle’s registration anniversary. The tax applies regardless of actual use of the vehicle.
5. IRS – Personal Income Tax obligations
IRS compliance involves several steps before and beyond filing the tax return itself.
During the year / until February: Validation and classification of deductible expenses through e-Fatura. This process directly affects deductions and the final tax assessment.
Household composition: Confirmation or update of household (agregado familiar): until early March 2026 (date set annually by the Tax Authority).
IRS tax return (Modelo 3)
Filing period: 1 April to 30 June 2026 (with possibility to request filing extension for 31 December 2026 if receiving foreign income over which tax at source is not determined by 30 June and may grant the right to a tax credit).
Residents: must report worldwide income.
Non-residents: must report Portuguese-source income not subject to final withholding tax.
Partial-year residency: may require more than one return for the same year.
Failure to complete any of these steps may result in incorrect assessments, loss of tax benefits or penalties.
2026 Tax Calendar Overview
January
Self-employed individuals / Household employers
Social Security contributions for December: payment between 10 and 20 January.Self-employed individuals (simplified regime)
Quarterly Social Security income declaration: January.Property owners (rental income — exception)
Modelo 44 submission, where applicable (rents received in 2025): by 31 January 2026.Household employers (domestic workers)
Annual reporting of remuneration paid: by the end of January.
February
All taxpayers
Validation and classification of deductible expenses through e-Fatura: until 25 February 2026.Self-employed individuals (VAT — quarterly regime)
VAT return and payment for Q4 2025: by 20 February 2026.Self-employed individuals / Household employers
Ongoing Social Security contributions: 10th–20th.
March
All taxpayers
Confirmation or update of household composition (agregado familiar): until early March 2026 (date set annually by the Tax Authority).Self-employed individuals / Household employers
Ongoing Social Security contributions: 10th–20th.
April
All taxpayers required to file IRS
Opening of IRS tax return filing period (Modelo 3): from 1 April 2026.Self-employed individuals / Household employers
Ongoing Social Security contributions: 10th–20th.
May
Property owners
IMI — first instalment or single instalment, where applicable.Self-employed individuals (VAT — quarterly regime)
VAT return and payment for Q1 2026: by 20 May 2026.Self-employed individuals / Household employers
Ongoing Social Security contributions: 10th–20th.
June
All taxpayers required to file IRS
Deadline for filing IRS tax return (Modelo 3): 30 June 2026.Self-employed individuals / Household employers
Ongoing Social Security contributions: 10th–20th.
July
Self-employed individuals (simplified regime)
Quarterly Social Security income declaration: July.Self-employed individuals / Household employers
Ongoing Social Security contributions: 10th–20th.
August
Property owners
IMI — second or third instalment, where applicable.Self-employed individuals (VAT — quarterly regime)
VAT return and payment for Q2 2026: by 20 August 2026.Self-employed individuals / Household employers
Ongoing Social Security contributions: 10th–20th.
October
Self-employed individuals (simplified regime)
Quarterly Social Security income declaration: October.Self-employed individuals / Household employers
Ongoing Social Security contributions: 10th–20th.
November
Property owners
IMI — final instalment, where applicable.Self-employed individuals (VAT — quarterly regime)
VAT return and payment for Q3 2026: by 20 November 2026.Self-employed individuals / Household employers
Ongoing Social Security contributions: 10th–20th.
December
Taxpayers who requested and were granted an IRS filing extension
Deadline for filing IRS tax return (Modelo 3) due to foreign-source income where the corresponding foreign tax was not determined by 30 June: 31 December 2026.Self-employed individuals / Household employers
Ongoing Social Security contributions: 10th–20th.
Throughout the year
Self-employed individuals
Issuance of invoices: within 5 days of the transaction.Property owners (rental income)
Issuance of electronic rent receipts, upon receipt of rent.Self-employed individuals (organised accountancy)
Monthly VAT returns: by the 20th of the second month following the taxable period.Vehicle owners
Vehicle tax (IUC): payable in the month of the vehicle’s registration anniversary.
This calendar summarises the most common recurring obligations. Depending on the applicable tax regime, residency status and nature of income, additional obligations or specific deadlines may apply.
Why this matters
Many issues faced by private clients do not arise from complex planning, but from missed deadlines, incomplete reporting or lack of coordination between parallel obligations.
This is particularly relevant for:
self-employed professionals;
households acting as employers;
landlords;
internationally mobile individuals;
and families with different and international income sources.
Ongoing monitoring and timely compliance are essential to avoid unnecessary tax exposure.
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This insight is provided for general information purposes only and does not constitute legal or tax advice. It is not intended to be an exhaustive statement of the law and shuold not be relied upon as a substitute for advice tailored to individual circumstances.
Enquiries may be directed to info@flegal.pt or via the Contacts section here.